S allius/issue383 (#384)

* configure path to web files for Quart

* copy web-file into the add-on container

* add test template and stylesheet

* add w3.css dashboard

* fix unit test for test dashboard

* add Roboto font

* add awesome web font

* add all favicon formats

* load fonts locally

* adapt unit tests

* add all font and favicons to add-on

* fix sonarqube warnings

* add unit tests for all favicons

app/src/web/static/images/site.webmanifest

@@ -0,0 +1,21 @@
+{
+  "name": "TSUN-Proxy",
+  "short_name": "TsunProxy",
+  "icons": [
+    {
+      "src": "/web-app-manifest-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "maskable"
+    },
+    {
+      "src": "/web-app-manifest-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ],
+  "theme_color": "#ffffff",
+  "background_color": "#ffffff",
+  "display": "standalone"
+}